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  Problem with older A7A266 and 2GB Memory 
 Date Written 
John Broadis Jan 04, 2006, 10:28am EST Report Abuse
I have an A7A266 board which did everything I want it to. For Christmas I decided to treat myself and do a memory upgrade. This board is supposed to accept upto 2GB PC2100 DDR SDRAM. Kingston Technologies suggested their 1GB sticks which I ordered. Memory arrived yesterday but the Mobo won't recognize both sticks together. I've updated the BIOS as far as it will go (remember it's an older board). The Mobo will recognize either stick, one at a time, either slot, but not both at the same time.

ASUS says it's a memory problem but I've research the heck out of it and found that this board MAY NOT handle 2GB as the company promises.

Please read for more:

Anybody have any suggestions except for the obvious of sending 1GB back and accepting the fact that technology has passed this ol mobo by....


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Mat Nairb Jan 04, 2006, 10:50am EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
My A7V266 board will not recognize any memory I put into it except from Micron. I have tried two other generic brands. Lei memory, detects half of it. Blitz memory, Windows freezes and doesn't boot. My next type to try is Corsair whenever I get the chance.

John Broadis Jan 04, 2006, 05:23pm EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
Thanks for that little bit. Nothing is surprising me. The ram I have is Kingston. Kingston Tech support told me to try a bigger power supply. Currently I'm running a 300W. Going to jack it to 450W. Kingston Techies told me 1GB sticks are power hogs.

Victor Hackney Jan 04, 2006, 09:29pm EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
Hi! John,

Take a look at the many posts on this board,.... yours has been added to its data base ....I see.:-));Where=1

There are several pages (with interuptions from other posters on non related usual :-) ) but in the main there is some useful info if you search the pages.
There were many A7's around at that time,(circa 2000) with various versions including the A7N266 and that was a headache for some posters. The A7V266-E a neighbour of mine is still using one with 1gig, and he says it's rated up to 3Gig??and strangely enough he has had very little problems and uses Win98 SE.:-))

Good Luck Take care

Kind regards
Take care
Vic UK

All forces are equal and opposite
Mat Nairb Jan 04, 2006, 10:38pm EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
John, I don't know if you have a Staples store near you but the one near me usually has older types of RAM. I find them a bit more expensive but if you find something that works then who cares. If not, then you can just simply return it.

John Broadis Jan 05, 2006, 10:03am EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
The thing is, I got a sweet deal on the memory. This board uses PC2100 non ECC ram so I went to Kingston and ordered what they suggested. When I intially bought this board 1GB sticks were probably running about $1000. I got these for $82. ASUS's Customer NOService didn't help. They suggested I call the RMA dept and see if I could return the board for warranty. No sure what he was smokin'. This board is WAY past warranty.

Yes I probably could've (should've) bought faster ram. I could use it when I further upgrade my system. (Maybe in 2022) I don't upgrade that often and THAT would be a waste.

As I posted earlier, Kingston suggested upgrading my power supply to 400W minimum. I've a 500W on it's way. My brother has already call "BULL$&*%"! on this one. I'm willing to try everything.


Francois POIRIER Jan 18, 2006, 05:05am EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory

I'm sure you feel very angry with your problem :o(( It's just like me. I already have 2x512Mo SDRAM PC133 and as i tested 2x256Mo DDR PC2100 and it was ok, i decided to do an upgrade for this motherboard.

I bought 2x1Go DDR PC2100 Kingston series (KVR266X64C25/1G 266Mhz DDR Non-ECC CL2.5 Dimm).

I did the test following:
1. Just 1x1Go DDR > detect OK and boot Windows OK
2. The same one but in the other slot > detect OK and boot Windows OK
3. The same test 1. et 2. with the other DDR 1Go > detect OK and boot Windows OK
4. When i plug the 2x1Go together > only 1Mo is detected and i got the message "Update ESD Succesfully", then the workstation frozen. No boot OS.
5. For fun :o(, I tried 1x1Go DDR + 1x256Mo DDR > detect 1280Mo OK and boot Windows OK
6. BIOS is v1012 in auto detection mode, with "load default options" > no change !
7. With Bios in manual options > no change !

It's not a power supply issue because i did the test whith only motherboard en video card supplied!

I think ASUS didn't do this test and this motherboard isn't able to upgrade to 2Go DDR PC2100 (as it's explain in the spec).

I thought it was a problem of RAM allocation for BIOS Cache or Video Card before the RAM detection test....
Maybe the BIOS think there is more than 2Go on the motherboard...
I didn't find an options to disable something like that (be sure i tried to disable all !!!).

3 evenings on the problem and i didn't find any solution. I decided to ask for a change and go to 2x512Mo DDR in Kingstion series.

That's all.
Sorry, no solution.

John Broadis Jan 19, 2006, 01:06am EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
You've done exactly what I've done. I've also found posts elsewhere where ASUS still swears that board will accept 2GB of memory but won't tell you whose memory will work.

You are right where you say ASUS didn't do testing for this amount of RAM. THEORETICALLY it should accept 2GB. That's what the engineers told the company but when reality sets in and the end user gets it, no go.

Going to RMA the one 1GB stick for a 512 and see if it'll see 1 1/2 GB. (Just for kicks)

Will keep y'all posted.


Victor Hackney Jan 19, 2006, 06:05am EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
Hi! John,
I had this board some 4-5 years ago, running Win98SE, and used 1Gbt although it stated in the manual that it supported up to 2Gbt. I never tried 2Gbt, but since then the person I sold it to (still running :-)) ), phoned me last night on an unrelated issue.
I mentioned the post here, and he said no he could not use 2Gbt also. Whilst talking, he got the manual, and said there was a loose additional page on various themes inside the manual (by Asus) " Dimms that have more than 18 chips are not supported on this motherboard, Asus motherboards support SPD "Serial Precence Detect" DMMS..This is the memory of choice for best performance vs stability"..those are the words he read to me on the phone", I may add that he still uses Win98SE with 1Gbt.:-)) :-)) unaware that Win98 does not fully make use of it..
I just thought I would post this as a matter of interest.

Incidently the later A7V 266-E supprted 3Gbt, and I ran one on 2 Gbt with no problem on XP, but that was a long time ago.

Later he sent me this link off some forum, which is only complaints of the 2Gbt issue

Asus have had the habit in the past of giving/printing information which is doubtful, and the number of mis- informations in the manuals are quite prolific., ie CRTC (2 pin short jumper) settings etc: etc: :-))

Best Wishes to all
Take Care
Vic UK

All forces are equal and opposite
Francois POIRIER Jan 19, 2006, 07:47am EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
Hi John, hi Victor,

Now, I have only 2 solutions:

1. change with RMA the 2x1Go for 2x512Mo and finally have 1Go (2x512) with DUAL CHANNEL activate
2. change with RMA only one 1Go DDR for one 512Mo DDR and work with 1,5Go DDR PC2100

I'm sure solution 2 will work beacause i tried it with 1Go+256Mo.

What i don't know is witch solution is the best. Does anyone can answer ?
I think benchmark will be similar or near similar...

Maybe i should go for 1,5Go...


Francois POIRIER Jan 30, 2006, 08:01am EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
Hi everybody,

Finally I chose to change with RMA the 2x1Go for 2x512Mo and finally have 1Go (2x512) with DUAL CHANNEL activate.

It's working !!!!!

Fast PowerOn. Fast phot scan. Fast video (adobe premiere).

ASUS A7A266 upgrade from 1Go SDRAM PC133 to 1Go DDR (2x512Mo DUAL CHANNEL).

Forget about 2Go on this motherboard. It's not working!
See you.

Shadow_Ops_Airman1 Jan 30, 2006, 08:41am EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
does this motherboard support all DDR or DDR and SDRAM?

AMD Athlon XP-M 2500+ (133x14= 1867MHz) (209x11= 2299MHz)
DFI LP NF2 Ultra-B (Hellfire 3EG Rev2)
Antec SX800, Neo HE 500, 4 Antec 8CM Fans
Thermalright SI-97 1 Antec Tricool 12CM Fan
CL SB XFi Xtreme Music
2x Barracuda HDs (250/400)
2x Samsung Write
John Broadis Jan 30, 2006, 11:04am EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
Well my new 512 stick came from Kingston after I RA'd the other 1GB. Installed it this weekend and wouldn't you know it. It worked. I now am running 1.5 GB memory.

Thanks to all who jumped in with there suggestions. I guess ASUS "mislead" everyone with there claim it could handle 2gb of memory.

Cheers and Good Luck to all


Karl Carey Aug 09, 2007, 03:51am EDT Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
I had the same problem. I can confirm it will boot OK with a 1Gb and 0.5Gb DDR. I don't suppose anyone has tried loading Vista Home Premium on a PC with the same mother Board?,
To say I am struggling is an under statement !, the only things I have not got around to disabling or removing or swapping so far are the internal sound from the bios and the BIOS virus detect and the USB keyboard.

For some reason the board will not recognize a PS2 keyboard or mouse any more

Joe Birley Aug 22, 2008, 01:11am EDT Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
I ran in to the same problem as everyone else on here. I went to and had it scan the system. It said the max DDR you could upgrade to was 1536MB. I thought they were wrong, and chose to believe the Asus owners manual. Guess the Asus owners manual must be wrong. Right now I'm running 1.25G, and probably won't bother buying a 512 stick just to get 256M more than I have now. Thanks for everyone's input.

Victor Hackney Aug 22, 2008, 06:15am EDT Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
Re Joe Birleyl
Hello young man, as you are probably aware this board is almost 7-8 years old and if you read the posts back to 2001 there are some suggestions.

So as not to confuse the issue I have posted this link (also from 2001)

Glad to hear that you eventually got the board running ok. Later manuals for this board had an extra page added to clarify errors in the original maual, re -memory, and there were some bios updates.the last one being a Beta version.

Kind Regards
Vic UK & Germany

All forces are equal and opposite
Joe Birley Aug 23, 2008, 03:25am EDT Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
Hey Victor,

Wow, I would be interested to see what those error corrections are, but I can't find that later manual update page.

I downloaded my manual from the Asus website, so you would think it would include all the latest info...


Jason H Mar 05, 2012, 03:19am EST Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
I dug out my old A7A266 motherboard and have everything i need installed on this thing and i too am having issues with the so-called and claimed 2GB of DDR DIMM?

im using Transcend 1GB DDR333 DIMM CL2.5 sticks
and it freezes up after the memscan.
ive tried pretty much everything ive read in this post except using a higher voltage power supply (400-500v) but i dont see that doing jack squat imo.

but i have managed to be able to use x1 1GB DDR333 DIMM CL2.5
with success which is alright but i want the full 2GB LOL

Will Z Jul 29, 2012, 08:14am EDT Report Abuse
>> Re: Problem with older A7A266 and 2GB Memory
I have a A7A266 PCB version 1.03. It works with 1GB DDR but not 2GB.
Also because I have 1.03, it doesn't support XP CPUs. Only version 1.10 or later, with BIOS version 1012 or 1013 will support the cutting-edge technology.
I however am running a Throughbred XP 2400 @ 2.00GHz CPU on it, multiplier is locked at 16 for some reason, so front side bus at 133 MHz doesn't work, I had to tune it down to 100MHz, which means the CPU runs at 1.6GHz instead of 2.0GHz, with a slower bandwidth too.
If your machine's freezing up with the RAM, could be that there's something wrong with the RAM. Also try changing the PSU. Old PSUs are sometimes unstable.



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